kernel/platform: Remove some #include duplicates.
[dragonfly.git] / sys / platform / vkernel / platform / shutdown.c
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1/*
2 * Copyright (c) 2007 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
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33 */
34/*
35 * Install a signal handler for SIGTERM which shuts down the virtual kernel
36 */
37
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38#include <sys/types.h>
39#include <sys/systm.h>
40#include <sys/reboot.h>
41#include <sys/kernel.h>
42#include <sys/kthread.h>
24eb47e0 43#include <sys/interrupt.h>
56f4b223 44#include <sys/bus.h>
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45#include <ddb/ddb.h>
46
47#include <sys/thread2.h>
48
49#include <machine/trap.h>
50#include <machine/md_var.h>
51#include <machine/segments.h>
52#include <machine/cpu.h>
53
54#include <err.h>
55#include <signal.h>
56#include <unistd.h>
57
58static void shutdownsig(int signo);
59static void shutdown_intr(void *arg __unused, void *frame __unused);
60
61static
62void
63initshutdown(void *arg __unused)
64{
65 struct sigaction sa;
66
67 bzero(&sa, sizeof(sa));
68 sigemptyset(&sa.sa_mask);
69 sa.sa_flags |= SA_NODEFER;
70 sa.sa_handler = shutdownsig;
71 sigaction(SIGTERM, &sa, NULL);
72
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73 register_int_virtual(2, shutdown_intr, NULL, "shutdown", NULL,
74 INTR_MPSAFE);
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75}
76
77static
78void
79shutdownsig(int signo)
80{
81 signalintr(2);
82}
83
84SYSINIT(initshutdown, SI_BOOT2_PROC0, SI_ORDER_ANY,
85 initshutdown, NULL);
86
87/*
88 * DragonFly-safe interrupt thread. We are the only handler on interrupt
89 * #2 so we can just steal the thread's context forever.
90 */
91static
92void
93shutdown_intr(void *arg __unused, void *frame __unused)
94{
95 kprintf("Caught SIGTERM from host system. Shutting down...\n");
96 if (initproc != NULL) {
97 ksignal(initproc, SIGUSR2);
98 } else {
99 reboot(RB_POWEROFF);
100 }
101}
102